Perhaps you have a more charitable view of some voters than I do. I’m grumpy and disheartened right now, seeing many that are fickle, easily bought, and even more easily distracted.
Many that always voted Labour for historic, family and cultural reasons won’t be returning as a reliable base vote. The same goes for the equivalent among Tory supporters. Once the habit is broken pretty much every election in every constituency is up for grabs. It’s an opportunity for both sides but one that it seems the mass media owning Conservatives are better able to take.